* {
  margin: 0;
  padding: 0;

  overflow-y: auto;
  /*overflow: hidden;*/
  /* Webkit浏览器隐藏滚动条 */
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE 10+ */
}

.box {
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  align-items: center;

  height: 100%;
  width: 100%;
}
.aside {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;

  margin: 0 15px;
  height: 90%;
  width: 160px;
  border-radius: 10px;
  box-shadow: 2px 2px 10px #888888;
  background-color: white;
}

.group_navigate {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  padding: 20px 0;

  overflow-y: auto;
  /*overflow: hidden;*/
  /* Webkit浏览器隐藏滚动条 */
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE 10+ */

  button {
    min-height: 50px; /* 确保最小高度 */
    margin: 20px 0;
    height: 50px;
    width: 80%;
    border-radius: 10px;
    border-width: 1px;
    border-color: white;
    background-color: #ff7500;
    font-family: '幼圆', serif;
    font-size: 20px;
    color: white;
    border: 4px solid #00000000
  }
}

.group_main {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;

  height: 90%;
  flex: 1;

  background-color: white;
  margin: 0 20px 0 10px;
  border-radius: 10px;
  box-shadow: 2px 2px 10px #888888;

  .title {
    font-family: '宋体', serif;
    font-size: 40px;
    font-weight: 900;
    color: #ff4e20;

    margin: 20px 0 0 0;
  }
  .group_name {
    font-family: '幼圆', serif;
    font-size: 40px;
    font-weight: 700;
    color: #a1afc9;
  }
  .time {
    font-family: '幼圆', serif;
    font-size: 80px;
    font-weight: 700;
    color: rgba(255, 0, 0, 0.521);
  }
  .operate_button {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    align-items: center;
    max-width: 800px;
    width: 95%;

    .bt1 {
      background-color: rgb(167, 229, 155);
    }
    .bt2 {
      background-color: rgb(255, 165, 165);
    }
    .bt3 {
      background-color: #4283c4;
    }
    .bt4 {
      background-color: #77b2ec;
    }

    button {
      width: 120px;
      height: 40px;
      border-radius: 20px;
      border-color: rgba(255, 255, 255, 0);
      border-width: 1px;
      margin: 20px 0;

      color: white;
      font-family: '幼圆', serif;
      font-size: 20px;
      font-weight: 700;

      transition: all 0.3s;
      cursor: pointer;

      &:hover {
        transition: all 0.3s;
        box-shadow: 2px 2px 3px #888888;
      }
    }
  }
}
